Specifications

2.4.3.3 Printer Initialization Switch
This slide switch is used in one of the two initialization procedures which
is described in the section on ‘‘Initializing a Locked-up Printer’’.
2.4.3.4 Inner Control Panel
In on-line and off-line, these switches perform the functions printed on
them. More functions are available by operating the PRG and FCT
switches while in the off-line state.
The PRG switch enters the programming mode. In this mode the
operator can use the switches to alter the printing and host interface
parameters.
The LG31 Installation/Operator’s Manual contains full instructions on
the use of the switches in Normal, Programming and Function modes.
The FCT switch enters the function mode. In this mode the keys are
redefined to provide a selection of functions related to:
• Forms setup
• Initialization
• Print Quality Adjustment
2.4.3.5 External Control Panel
This panel has the three most commonly used controls; they are repeats
of the controls of the same name on the Inner Control Panel. Thus, these
controls can be used without opening the cover of the printer.
2.4.4 Shuttle Matrix System Microprocessor (SMSM)
The SMSM board is located in the card cage on the right side of the
printer. It receives data from the RS-232 interface, the user-operated
control panel, and the SMIM board.
Data received from the RS-232 interface is combined with parameters
(font, line spacing, print density, and so forth) and transmitted to the
imaging microprocessor (SMIM).
SMSM scans the input lines from the internal control panel and decodes
the input to take the appropriate action.
2–10 THEORY OF OPERATION